From: Zhihao Cheng <chengzhihao1@huawei.com>
Date: Fri, 9 Apr 2021 01:12:01 +0000 (+0800)
Subject: char: tpm: fix error return code in tpm_cr50_i2c_tis_recv()
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=3d785d73b4c1014839d9f9af0ee526f8d5706a73;p=linux.git

char: tpm: fix error return code in tpm_cr50_i2c_tis_recv()

Fix to return a negative error code from the error handling
case instead of 0, as done elsewhere in this function.

Fixes: 3a253caaad11 ("char: tpm: add i2c driver for cr50")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
---

diff --git a/drivers/char/tpm/tpm_tis_i2c_cr50.c b/drivers/char/tpm/tpm_tis_i2c_cr50.c
index ec9a65e7887dd..f19c227d20f48 100644
--- a/drivers/char/tpm/tpm_tis_i2c_cr50.c
+++ b/drivers/char/tpm/tpm_tis_i2c_cr50.c
@@ -483,6 +483,7 @@ static int tpm_cr50_i2c_tis_recv(struct tpm_chip *chip, u8 *buf, size_t buf_len)
 	expected = be32_to_cpup((__be32 *)(buf + 2));
 	if (expected > buf_len) {
 		dev_err(&chip->dev, "Buffer too small to receive i2c data\n");
+		rc = -E2BIG;
 		goto out_err;
 	}